Add support for database events in Doctl

[bhardwajRahul]

This PR aims at adding support for database events in Doctl.

Command Details

Retrieves a list of database cluster events:

You can get a list of database events by calling:

	doctl databases events list <cluster-id>

Usage:
  doctl databases events list <database-cluster-id> [flags]

Aliases:
  list, ls

Examples:
The following example retrieves a list of databases events in a database cluster with the ID `ca9f591d-f38h-5555-a0ef-1c02d1d1e35`: doctl databases events list ca9f591d-f38h-5555-a0ef-1c02d1d1e35

Global Flags:
  -t, --access-token string   API V2 access token
  -u, --api-url string        Override default API endpoint
  -c, --config string         Specify a custom config file (default "/home/user/.config/doctl/config.yaml")
      --context string        Specify a custom authentication context name
      --http-retry-max int    Set maximum number of retries for requests that fail with a 429 or 500-level error (default 5)
      --interactive           Enable interactive behavior. Defaults to true if the terminal supports it (default true)
  -o, --output string         Desired output format [text|json] (default "text")
      --trace                 Show a log of network activity while performing a command
  -v, --verbose               Enable verbose output
  

Command Usage

doctl -t $token databases events list 46f972cf-c41b-433e-96f6-8fad9cbd7119

Ouput

ID               Cluster Name           Type of Event     Create Time
pe49fdf5c6275    db-kafka-nyc3-22258    cluster_create    2024-03-21T11:01:16Z

[andrewsomething]

This looks great! As it adds a new command, can we also get an integration style test. For example:

https://github.com/digitalocean/doctl/blob/main/integration/database_user_list_test.go

[andrewsomething]

Thanks!